Answer:
T = 58 + 273.15 = 331.15
R = 0.082 atm
V = 250.0 mL / 1000 = 0.25 L
P = n x R x T / V
P = 2.48 x 0.082 x 331.15 / 0.25
P = 67.342 / 0.25
P = 269.368 atm
Explanation:
In a neutral compound, the charges must balance, the net
charge should be zero.
Since the charge of Fe is 3+ and that of O is 2-, therefore,
there should be 2 Fe 3+ ions per 3 O2- ions in order to have a net charge of
zero.
Answer:
There is 61.538% oxygen in Al2(SO4)3.
Explanation:
Wt Of oxygen in the compound = 12*16 = 192 amu.
Total Wt. Of the compound = 2*12+3*32+12*16 = 312 amu.
Thus, percent of oxygen = Wt of oxygen/total Wt. Of compound *100
= 192/312 * 100=61.538 %
Answer:
D)Coat the disc with another pure substance, such as copper.
Explanation:
To make a mixture of the zinc, simply coat it with another pure substance such as copper. This will result in a mixture.
What then is a mixture?
- They are impure substances with indefinite composition.
- They retain their physical properties
- their constituents reacts differently to changed conditions
- They can easily be separated into constituents by physical methods.
We can see that coating the copper on the zinc does not alter the physical properties of the metal.
Most times, the copper will wear off and leave behind the zinc.
The metal coated can easily be removed and this signifies just a physical mix.
Answer:
air is a group of different gases and gas is loose bound atoms of an element
Explanation:
